CVE-2026-78018

Executive Summary

CVE-2026-78018 is an insecure default resource initialization vulnerability (CWE-1188) affecting Dell Secure Connect Gateway (SCG) Policy Manager versions prior to 5.34.00.16. A locally authenticated low-privileged attacker could exploit insecure default configuration artifacts to obtain sensitive information, with the CVSS v3.1 base score of 6.3 reflecting local access (AV:L), high attack complexity (AC:H), low privileges required (PR:L), and high confidentiality and integrity impact (C:H/I:H). The CVSS vector does not include a patch state; however, given the absence of vendor-fix evidence and the unpatched status tracked here, organizations should treat affected deployments as at risk pending confirmation of the fixed version.

Technical Analysis

The vulnerability is classified under CWE-1188, "Initialization of a Resource with an Insecure Default." This class covers cases where a product or component initializes a resource — a credential store, key material, configuration file, service account, or permission set — using values that are insecure by default rather than requiring the operator to set secure values. In the context of Dell Secure Connect Gateway Policy Manager, a policy management component, insecure defaults are typically embedded in pre-seeded configuration, default service credentials, or default file/resource permissions assigned during installation or first-run initialization.

The CVSS vector warrants careful interpretation. The attack vector is Local (AV:L), meaning the attacker must already possess a foothold on the affected host — such as an unprivileged local user account, a low-integrity process, or an adjacent session on the management appliance. Privileges Required is Low (PR:L), so no administrative rights are needed; any authenticated local user can attempt the exploit. Attack Complexity is High (AC:H), indicating that success depends on conditions outside the attacker's direct control — for example, the presence of a specific default resource state, a race condition during initialization, or a non-deterministic configuration condition. User Interaction is None (UI:N), so no victim action is required.

The impact scope is Unchanged (S:U): the exploited component remains the same security authority. Both Confidentiality and Integrity are rated High (C:H/I:H), with no Availability impact (A:N). The High confidentiality rating aligns with the vulnerability description's explicit statement that exploitation leads to information disclosure. The High integrity rating suggests that, in addition to reading sensitive data, an attacker may also be able to alter the improperly initialized resource or data dependent on it — for example by writing to a file or resource initialized with insecure default permissions or ownership, or by influencing configuration consumed by privileged components.

No CNA title, no affected-version enumeration, and no vendor advisory text were provided in the source data beyond the version threshold (< 5.34.00.16). Specific default values, file paths, configuration keys, service names, and initialization routines are therefore not quoted here. The precise default that is insecure — for example a default credential, a world-readable configuration artifact, or a default permissive resource ACL — is not stated in the available description. Any code-level detail beyond the CWE-1188 class would be speculation and is intentionally omitted. What is certain is the vulnerability class: a resource is created or initialized with defaults that should have been hardened at install or first-run time, and a local low-privileged user can leverage that state to disclose information (and, per the integrity subscore, potentially tamper with the resource's contents or dependents).

Exploitation Scenarios

No public PoC is available for CVE-2026-78018; the following attack chain is inferred from the vulnerability class (CWE-1188) and the CVSS vector, not from published exploit code.

1. Reconnaissance / target identification. The attacker first obtains local access to a host running Dell Secure Connect Gateway Policy Manager in a version earlier than 5.34.00.16. Local access can be achieved through a pre-existing low-privileged account, an application-level foothold, or a shared management workstation. The attacker then enumerates the installed SCG Policy Manager instance and identifies resources initialized by the product — for example configuration artifacts or service resources created during installation or first run — whose permissions, ownership, or default values appear inconsistent with least privilege.

2. Triggering the flaw. Because the defect is an insecure default assigned at resource initialization, the attacker does not need a complex exploit primitive; the vulnerable state already exists. The attacker inspects or queries the improperly initialized resource with the local low-privileged account. The High Attack Complexity (AC:H) rating implies that successful exploitation may depend on the specific state of the resource — for instance, whether it retains default settings, whether a particular initialization path was taken, or timing during a service restart or first-run sequence.

3. Payload / execution method. At the vulnerability-class level, exploitation consists of reading the insecurely initialized resource and any sensitive data it exposes (credentials, tokens, configuration values, or policy data). Where the integrity subscore applies, the attacker may also be able to modify the resource's contents or permissions if the default initialization leaves it writable by low-privileged principals. No specific API parameters, endpoints, file paths, or function names can be asserted from the available description.

4. Post-exploitation impact. The attacker obtains information disclosed by the insecure default — potentially credentials or configuration data that enable lateral movement or privilege escalation within the SCG management plane — and may be able to corrupt or alter policy-relevant data given the High integrity impact. Because the scope is unchanged, the direct impact is confined to the SCG Policy Manager security context, though the disclosed data may serve as a pivot to adjacent Dell management infrastructure.

Impact Assessment

Business impact centers on the disclosure of sensitive information held or referenced by Dell Secure Connect Gateway Policy Manager, a component used to manage and enforce security policies across Dell infrastructure. A local low-privileged attacker who successfully exploits CVE-2026-78018 gains high confidentiality impact (C:H): default-initialized resources may expose credentials, tokens, or configuration data that would otherwise require elevated privileges to read. The High integrity impact (I:H) indicates that the same insecure initialization may permit unauthorized modification of resource contents, potentially weakening policy enforcement or planting persistent configuration changes.

The blast radius is constrained by the CVSS vector: AV:L limits the attack to local access, and S:U confines impact to the vulnerable component's security authority. Availability is unaffected (A:N), so policy enforcement data remains readable to legitimate consumers even during exploitation. The overall base score of 6.3 (Medium) reflects high impact counterbalanced by local access and high attack complexity. EPSS has not yet been scored by FIRST.org, and there is no evidence of CISA KEV inclusion, active exploitation, or public exploit code. The patch confidence is 0/4 (UNPATCHED) per tracked sources, meaning the risk posture for exposed instances is unresolved pending vendor confirmation.

Detection Guidance

Sigma Rule

title: Potential CVE-2026-78018 - Insecure Default Resource Access in Dell SCG Policy Manager
id: 9f2c5e6a-3d41-4c7b-9b8e-202678018
status: experimental
description: Detects local access to resources or configuration initialized with insecure defaults by Dell Secure Connect Gateway Policy Manager prior to 5.34.00.16, consistent with CWE-1188 information disclosure.
references:
  - https://nvd.nist.gov/vuln/detail/CVE-2026-78018
author: valtersit.com
date: 2026/01/01
tags:
  - attack.t1552
  - cve.2026-78018
logsource:
  product: linux
  service: auditd
detection:
  selection_product:
    - 'Image|endswith': '/scg'
    - 'Image|contains': 'secureconnect'
    - 'Image|contains': 'policy-manager'
  selection_access:
    - 'type': 'PATH'
    - 'name|contains': 'scg'
    - 'key': 'scg_config'
  condition: selection_product and selection_access
falsepositives:
  - Legitimate administrator inspection of SCG configuration files
level: medium

YARA Rule

rule CVE_2026_78018_Dell_SCG_Insecure_Default
{
    meta:
        author = "valtersit.com"
        description = "Detects Dell Secure Connect Gateway Policy Manager version strings prior to 5.34.00.16 in binaries or configuration artifacts"
        reference = "https://nvd.nist.gov/vuln/detail/CVE-2026-78018"
        date = "2026-01-01"

    strings:
        $prod1 = "Secure Connect Gateway" ascii nocase
        $prod2 = "Policy Manager" ascii nocase
        $ver   = "5.34.00.16" ascii

    condition:
        (uint16(0) == 0x5A4D or uint32(0) == 0x464C457F) and
        any of ($prod*) and
        not $ver
}

Suricata IDS Rule

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"CVE-2026-78018 Dell Secure Connect Gateway Policy Manager Information Disclosure Attempt"; flow:to_server,established; http.header; content:"User-Agent"; content:"scg"; nocase; content:"Policy"; nocase; reference:cve,2026-78018; reference:url,https://nvd.nist.gov/vuln/detail/CVE-2026-78018; classtype:attempted-recon; sid:202678018; rev:1;)

Elastic Detection

process where process.name in ("scg", "scg-policy-manager", "secureconnect") and
  event.action in ("access", "open", "read", "write") and
  file.path : ("*scg*config*", "*policy-manager*default*")

Splunk SPL Query

index=endpoint sourcetype=auditd OR sourcetype=sysmon
("Secure Connect Gateway" OR "scg" OR "Policy Manager")
(proc_name="*scg*" OR file_path="*scg*")
| stats count earliest(_time) as first_seen latest(_time) as last_seen by host, user, proc_name, file_path
| where count > 0
| sort - count

Wazuh OSSEC Rule

<group name="dell_scg,cve_2026_78018,">
  <rule id="202678"> <!-CVE-2026-78018 Dell SCG Policy Manager insecure default resource access -->
    <decoded_as>json</decoded_as>
    <field name="syscall">openat|read|write</field>
    <field name="path" type="pcre2">.*(scg|secureconnect|policy-manager).*</field>
    <field name="syscall">openat|read|write</field>
    <description>CVE-2026-78018: potential local access to insecurely initialized Dell SCG Policy Manager resource</description>
    <mitre>
      <id>T1552</id>
    </mitre>
    <group>cve_2026_78018,</group>
    <level>10</level>
  </rule>
</group>

Mitigation & Patch Guidance

Patch confidence: 0/4 (UNPATCHED — no patch evidence from any tracked source).

1. Immediate mitigations. Restrict local access to hosts running Dell Secure Connect Gateway Policy Manager to the smallest set of trusted administrators; eliminate unnecessary low-privileged accounts. Audit installation and first-run generated resources for insecure defaults (world-readable/writable configuration, default credentials, overly permissive resource permissions) and harden them where operationally feasible. Apply host-based monitoring for unexpected access to SCG-related configuration and policy artifacts, and isolate SCG management interfaces on a segmented management network.

2. Patch/upgrade steps. Upgrade Dell Secure Connect Gateway Policy Manager to version 5.34.00.16 or later, which is the version threshold referenced in the vulnerability description. Because no vendor advisory or patch evidence was available from tracked sources at the time of writing, verify availability and applicability of the fix directly through Dell's official support channels before scheduling maintenance. Treat all versions below 5.34.00.16 as affected.

3. Long-term hardening. Implement configuration baselines that enforce least privilege on resources created by management appliances, with automated drift detection to catch insecure defaults reappearing after reinstall or upgrade. Enforce centralized, privileged access management for local administrative sessions on SCG hosts, and integrate SCG logs into the SIEM with detection rules above. Monitor Dell security advisories, the NVD entry for CVE-2026-78018, and CISA KEV for changes in exploitation status or vendor guidance.

References

• NVD — CVE-2026-78018: https://nvd.nist.gov/vuln/detail/CVE-2026-78018
• CWE-1188 (Initialization of a Resource with an Insecure Default): https://cwe.mitre.org/data/definitions/1188.html
• Dell Secure Connect Gateway product and security advisory portal: https://www.dell.com/support/security/
• MITRE ATT&CK T1552 (Unsecured Credentials): https://attack.mitre.org/techniques/T1552/
• CISA Known Exploited Vulnerabilities Catalog (CVE-2026-78018 not listed as of writing): https://www.cisa.gov/known-exploited-vulnerabilities-catalog

No threat actor campaigns or exploit-in-the-wild evidence were identified for CVE-2026-78018 in the available data.